83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
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*/
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#include <common.h>
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#include <dm.h>
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#include <regmap.h>
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#include <syscon.h>
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#include <sysreset.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct sti_sysreset_priv {
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phys_addr_t base;
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};
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static int sti_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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struct sti_sysreset_priv *priv = dev_get_priv(dev);
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generic_clear_bit(0, (void __iomem *)priv->base);
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return -EINPROGRESS;
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}
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static int sti_sysreset_probe(struct udevice *dev)
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{
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struct sti_sysreset_priv *priv = dev_get_priv(dev);
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struct udevice *syscon;
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struct regmap *regmap;
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struct fdtdec_phandle_args syscfg_phandle;
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int ret;
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/* get corresponding syscon phandle */
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ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
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"st,syscfg", NULL, 0, 0,
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&syscfg_phandle);
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if (ret < 0) {
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pr_err("Can't get syscfg phandle: %d\n", ret);
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return ret;
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}
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ret = uclass_get_device_by_of_offset(UCLASS_SYSCON,
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syscfg_phandle.node,
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&syscon);
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if (ret) {
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pr_err("%s: uclass_get_device_by_of_offset failed: %d\n",
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__func__, ret);
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return ret;
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}
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regmap = syscon_get_regmap(syscon);
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if (!regmap) {
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pr_err("unable to get regmap for %s\n", syscon->name);
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return -ENODEV;
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}
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priv->base = regmap->ranges[0].start;
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return 0;
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}
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static struct sysreset_ops sti_sysreset = {
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.request = sti_sysreset_request,
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};
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static const struct udevice_id sti_sysreset_ids[] = {
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{ .compatible = "st,stih407-restart" },
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{ }
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};
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U_BOOT_DRIVER(sysreset_sti) = {
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.name = "sysreset_sti",
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.id = UCLASS_SYSRESET,
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.ops = &sti_sysreset,
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.probe = sti_sysreset_probe,
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.of_match = sti_sysreset_ids,
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.priv_auto_alloc_size = sizeof(struct sti_sysreset_priv),
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};
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